batgrbproduct analysis for trigger=932608
batgrbproduct Analysis for Trigger=932608
Analysis Summary
Notes:
- 1) No attempt has been made to eliminate the non-significant decimal places.
- 2) This batgrbproduct analysis is done of the amount of data for this trigger downloaded to date.
- 3) This batgrbproduct analysis is using the flight position for the mask-weighting calculation.
- 4) This page will be updated for up to 15 downlinks after the trigger.
======================================================================
BAT GRB EVENT DATA PROCESSING REPORT
Process Script Ver: batgrbproduct v2.46
Process Start Time (local time): Fri Nov 1 20:16:13 EDT 2019
Host Name: bat1
Current Working Dir: /local/data/bat1/prebascript/trigger932608/GCN5_download_cron
======================================================================
Trigger: 00932608 Segment: 000
BAT Trigger Time: 594249834.976 [s; MET]
Trigger Stop: 594249835.04 [s; MET]
UTC: 2019-10-31T21:23:31.132400 [includes UTCF correction]
Where From?: (*SHORT BURST*) TDRSS scaled map message
BAT
RA: 283.275055137207 Dec: 47.6387522535621 [deg; J2000]
Catalogged Source?: NO
Point Source?: YES
GRB Indicated?: YES [ by BAT flight software ]
Image S/N Ratio: 8.55
Image Trigger?: NO
Rate S/N Ratio: 82.8613299434664 [ if not an image trigger ]
Image S/N Ratio: 8.55
Flight Position: [ source = BAT ]
RA: 283.275055137207 Dec: 47.6387522535621 [deg; J2000]
Ground Position: [ source = BAT pre-slew burst ]
RA: 283.26868052029 Dec: 47.6446813592892 [deg; J2000]
{ 18h 53m 04.5s , +47d 38' 40.9" }
+/- 1.35316274257076 [arcmin] (estimated 90% radius based on SNR)
+/- 0.633242002280267 [arcmin] (formal 1-sigma fit error)
SNR: 19.7458338208116
Angular difference between Flight and Ground position is 0.439277 arcmin
Partial Coding Fraction: 0.375 [ including projection effects ]
Duration
T90: 0.287999987602234 +/- 0.0468188385078391
Measured from: -0.0199998617172241
to: 0.26800012588501 [s; relative to TRIGTIME]
T50: 0.139999985694885 +/- 0.0215406475404197
Measured from: 0.0160001516342163
to: 0.156000137329102 [s; relative to TRIGTIME]
Fluence
Peak Flux (peak 1 second)
Measured from: -0.359999895095825
to: 0.640000104904175 [s; relative to TRIGTIME]
Total Fluence
Measured from: -0.031999945640564
to: 0.308000087738037 [s; relative to TRIGTIME]
Band 1 Band 2 Band 3 Band 4
15-25 25-50 50-100 100-350 keV
Total 0.067913 0.163588 0.191024 0.123959
0.010130 0.013294 0.015691 0.015071 [error]
Peak 0.076146 0.164403 0.195105 0.132540
0.014139 0.016649 0.017940 0.017507 [error]
[ fluence units of on-axis counts / fully illuminated detector ]
======================================================================
=== Fluence/Peak Flux Summary ===
Model Band1 Band2 Band3 Band4 Band5 Total
15-25 25-50 50-100 100-350 15-150 15-350 keV
Fluence Power-law 2.35e-08 6.65e-08 1.52e-07 9.40e-07 4.11e-07 1.18e-06 erg/cm2
Error 4.23e-09 7.10e-09 1.43e-08 2.07e-07 3.92e-08 2.14e-07 erg/cm2
Peak flux Power-law 8.18e-01 1.22e+00 1.36e+00 2.85e+00 4.26e+00 6.24e+00 ph/cm2/s
Error 1.88e-01 1.67e-01 1.40e-01 6.82e-01 4.35e-01 7.18e-01 ph/cm2/s
Fluence Cutoff-PL 2.36e-08 6.67e-08 1.53e-07 9.29e-07 4.11e-07 1.17e-06 erg/cm2
Error 4.23e-09 7.06e-09 1.46e-08 2.65e-07 3.90e-08 2.47e-07 erg/cm2
Peak flux Cutoff-PL 8.31e-01 1.23e+00 1.35e+00 2.78e+00 4.26e+00 6.19e+00 ph/cm2/s
Error 1.89e-01 1.66e-01 1.41e-01 5.74e-01 4.33e-01 7.96e-01 ph/cm2/s
Fluence Band -------- -------- -------- -------- -------- -------- erg/cm2
Error -------- -------- -------- -------- -------- -------- erg/cm2
Peak flux Band -------- -------- -------- -------- -------- -------- ph/cm2/s
Error -------- -------- -------- -------- -------- -------- ph/cm2/s
=== Time-averaged spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.803 0.151 - - 1.04e-01 9.02e-03 59.300 57
CPL 0.801 0.170 9999.4 0.0 1.04e-01 2.92e-02 59.330 56
=== 1-s peak spectral analysis ===
Model Ph_index Ph_90err Epeak Epeak_90err Norm Nomr_90err chi2 dof
PL 0.846 0.187 - - 3.71e-02 3.83e-03 53.390 57
CPL 0.835 0.261 9999.4 0.0 3.73e-02 8.60e-03 53.440 56
Model : spectral model: simple power-law (PL) and cutoff power-law (CPL)
Ph_index : photon index: E^-{Ph_index} (minus sign is not included in the index)
Ph_90err : 90% error of the photon index
Epeak : Epeak in keV
Epeak_90err: 90% error of Epeak
Norm : normalization at 50 keV in PL model and at 1 keV in CPL model
Nomr_90err : 90% error of the normalization
chi2 : Chi-Squared
dof : degree of freedom
=== T90/T50 calculation in the 50-300 keV band (BATSE band) using 64 ms lc ===
T90 in the 50-300 keV band: 0.256000 sec.
T50 in the 50-300 keV band: 0.064000 sec.
=== Table of the duration information ==
Value tstart tstop
T100 0.340 -0.032 0.308
T90 0.288 -0.020 0.268
T50 0.140 0.016 0.156
Peak 1.000 -0.360 0.640
Image
Pre-slew 15-350 keV image (Event data; bkg subtracted)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
283.2687 +47.6447 0.0097 43.2 -30.0 0.5774 19.7 TRIG_00932608
------------------------------------------
Foreground time interval of the image:
-0.032 0.308 (delta_t = 0.340 [sec])
Background time interval of the image:
-60.976 -0.032 (delta_t = 60.944 [sec])
Lightcurves
Notes:
- 1) All plots contain as much data as has been downloaded to date.
- 2) The mask-weighted light curves are using the flight position.
- 3) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 4) For all the mask-weighted lightcurves, the y-axis units are counts/sec/det where a det is 0.4 x 0.4 = 0.16 sq cm.
- 5) The verticle lines correspond to following: green dotted lines are T50 interval, black dotted lines are T90 interval, blue solid line(s) is a spacecraft slew start time, and orange solid line(s) is a spacecraft slew end time.
- 6) Time of each bin is in the middle of the bin.
1 s binning
From T0-310 s to T0+310 s
From T100_start - 20 s to T100_end + 30 s
Full time interval
64 ms binning
Full time interval
From T100_start to T100_end
From T0-5 sec to T0+5 sec
16 ms binning
From T100_start-5 s to T100_start+5 s
8 ms binning
From T100_start-3 s to T100_start+3 s
2 ms binning
From T100_start-1 s to T100_start+1 s
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) For long bursts, a spectral fit of the pre-slew DRM will introduce some errors in both a spectral shape and a normalization if the PHA file contains a lot of the slew/post-slew time interval.
- 3) For fits to more complicated models (e.g. a power-law over a cutoff power-law), the BAT team has decided to require a chi-square improvement of more than 6 for each extra dof.
- 4) For short bursts (T90<1sec), the specrtum is also fit with Blackbody, OTTB, and Double Blackbody.
Time averaged spectrum fit using the pre-slew DRM
Power-law model
Time interval is from -0.032 sec. to 0.308 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.803445 ( -0.153477 0.149091 )
Norm@50keV : 0.103697 ( -0.0090474 0.00900031 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.30 using 59 PHA bins.
# Reduced chi-squared = 1.040 for 57 degrees of freedom
# Null hypothesis probability = 3.916625e-01
Photon flux (15-150 keV) in 0.34 sec: 11.9167 ( -1.02427 1.02485 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.11414e-07 ( -3.90922e-08 3.93132e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.032 sec. to 0.308 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.800627 ( -0.193784 0.146575 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 0.104366 ( -0.00913244 0.0492554 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.33 using 59 PHA bins.
# Reduced chi-squared = 1.059 for 56 degrees of freedom
# Null hypothesis probability = 3.551465e-01
Photon flux (15-150 keV) in 0.34 sec: 11.9197 ( -1.0297 1.0197 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.11159e-07 ( 0 0 ) ergs/cm2
Band function
Time interval is from -0.032 sec. to 0.308 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.911033 ( 0.911044 0.911044 )
beta : -0.803445 ( -0.149052 0.153616 )
Epeak [keV] : 15.1152 ( -15.1153 -15.1153 )
Norm@50keV : 0.147725 ( -0.0529628 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 59.30 using 59 PHA bins.
# Reduced chi-squared = 1.078 for 55 degrees of freedom
# Null hypothesis probability = 3.216455e-01
Photon flux (15-150 keV) in 0.34 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 24.8391 (-3.38702 4.21053)
R^2/D10^2 : 0.305179 (-0.11123 0.166539)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 92.44 using 59 PHA bins.
# Reduced chi-squared = 1.622 for 57 degrees of freedom
# Null hypothesis probability = 2.074085e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.116e-08 2.120e-09
25- 50 6.310e-08 8.670e-09
50-150 2.889e-07 4.044e-08
15-150 3.632e-07 4.782e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 44.4570 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 121.99 using 59 PHA bins.
# Reduced chi-squared = 2.1402 for 57 degrees of freedom
# Null hypothesis probability = 1.252668e-06
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 3.764e-08 5.734e-09
25- 50 7.240e-08 3.921e-08
50-150 1.588e-07 8.601e-08
15-150 2.688e-07 1.437e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 10.9640 (-2.40757 2.56465)
R1^2/D10^2 : 2.40487 (-1.08628 2.3452)
kT2 [keV] : 79.5260 (-75.3015 -83.9722)
R2^2/D10^2 : 1.28580E-02 (-0.0093928 0.0346817)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.09 using 59 PHA bins.
# Reduced chi-squared = 0.9652 for 55 degrees of freedom
# Null hypothesis probability = 5.480230e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.258e-08 8.316e-09
25- 50 7.395e-08 2.787e-08
50-150 3.207e-07 1.714e-07
15-150 4.173e-07 2.001e-07
Peak spectrum fit
Power-law model
Time interval is from -0.360 sec. to 0.640 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.845870 ( -0.191218 0.183097 )
Norm@50keV : 3.70649E-02 ( -0.0038541 0.00380506 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.39 using 59 PHA bins.
# Reduced chi-squared = 0.9367 for 57 degrees of freedom
# Null hypothesis probability = 6.112491e-01
Photon flux (15-150 keV) in 1 sec: 4.25502 ( -0.434466 0.436098 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.25005e-07 ( -4.53318e-08 4.54949e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from -0.360 sec. to 0.640 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 0.835285 ( -0.333552 0.188216 )
Epeak [keV] : 9999.36 ( -9999.36 -9999.36 )
Norm@50keV : 3.72912E-02 ( -0.00378042 0.0134293 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.44 using 59 PHA bins.
# Reduced chi-squared = 0.9543 for 56 degrees of freedom
# Null hypothesis probability = 5.722454e-01
Photon flux (15-150 keV) in 1 sec: 4.26318 ( -0.43867 0.42695 ) ph/cm2/s
Energy fluence (15-150 keV) : 4.24861e-07 ( -4.5109e-08 4.4247e-08 ) ergs/cm2
Band function
Time interval is from -0.360 sec. to 0.640 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.869080 ( 0.868792 0.868792 )
beta : -0.845877 ( -0.182985 0.19153 )
Epeak [keV] : 15.1468 ( -15.1539 -15.1539 )
Norm@50keV : 5.34861E-02 ( -0.020153 0 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 53.39 using 59 PHA bins.
# Reduced chi-squared = 0.9707 for 55 degrees of freedom
# Null hypothesis probability = 5.363085e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 25.6784 (-4.25801 5.80073)
R^2/D10^2 : 9.57887E-02 (-0.0422125 0.0695375)
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 82.67 using 59 PHA bins.
# Reduced chi-squared = 1.450 for 57 degrees of freedom
# Null hypothesis probability = 1.475650e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.082e-08 2.520e-09
25- 50 6.219e-08 1.047e-08
50-150 3.028e-07 4.840e-08
15-150 3.758e-07 5.425e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 (-17.7462 -200)
Norm : 16.9605 (-1.79591 1.79591)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 94.30 using 59 PHA bins.
# Reduced chi-squared = 1.654 for 57 degrees of freedom
# Null hypothesis probability = 1.380089e-03
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 4.222e-08 2.355e-08
25- 50 8.121e-08 4.467e-08
50-150 1.781e-07 9.795e-08
15-150 3.015e-07 1.655e-07
Double BB
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 11.6724 (-2.26658 3.04489)
R1^2/D10^2 : 0.788996 (-0.442614 0.953829)
kT2 [keV] : 199.542 (-105.225 -199.542)
R2^2/D10^2 : 1.00736E-03 (-0.000211346 0.0106151)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 47.53 using 59 PHA bins.
#Fit statistic : Chi-Squared = 47.45 using 59 PHA bins.
# Reduced chi-squared = 0.8642 for 55 degrees of freedom
# Reduced chi-squared = 0.8628 for 55 degrees of freedom
# Null hypothesis probability = 7.527299e-01
# Null hypothesis probability = 7.551905e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.470e-08 1.048e-08
25- 50 7.888e-08 3.749e-08
50-150 3.305e-07 3.083e-07
15-150 4.341e-07 3.498e-07
Plot creation:
Fri Nov 1 20:19:36 EDT 2019